兰斯台德（荷兰语：Randstad）是荷兰的组合城市，包括该国最大的四座城市（阿姆斯特丹、鹿特丹、海牙和乌得勒支）及其周围地区，拥有750万居民（几乎占荷兰人口的一半；如果包括毗邻的一些城市，人口超过1000万，几乎占荷兰全部人口的2/3)，是欧洲最大的组群城市之一。主要城市包括阿尔梅勒、阿姆斯特丹、代尔夫特、多德雷赫特、豪达、哈勒姆、希尔弗瑟姆、莱顿、鹿特丹、海牙、乌得勒支及祖特尔梅尔。

兰斯台德的城市群大致呈新月形或链形。兰斯台德因而得名（rand意为边缘，stad意为城镇），被大城市所包围的区域称为绿色心脏（Groene Hart）。

The Randstad (Dutch pronunciation:[ˈrɑntstɑt]) is a megalopolis in the central-western Netherlands consisting primarily of the four largest Dutch cities (Amsterdam, Rotterdam, The Hague and Utrecht) and their surrounding areas. Among other things, it contains the Port of Rotterdam (the largest seaport in Europe, and until 2004 also the world's busiest seaport), and Amsterdam Airport Schiphol (one of the largest European airports). With a population of 7,100,000 it is one of the largest metropolitan regions in Europe, comparable in size to Milan or the San Francisco Bay Area, and covers an area of approximately 8,287 km². It's also one of the most important and densely populated economic areas in northwestern Europe.